Railway roadbed



RAILWAY ROHDBED Filed March 22, 1928 .m. mm A M; j

Patented Dec. 4, 19.28.

VVILLl'ATsfE DALTON, OF GLEIJVILLE, NEN YORK.

RAILVIAY BOADBED.

Application filed March 22, 1928. Serial No. 283,753.

The present invention relates to railway roadbeds and especially torailway roadbeds formed from concrete.

One object of my invention is to provide an improved concrete roadbedwherein pro- *isions are made for draining away water so as to preventaccumulations of moisture and frost beneath the rails, a thing whichtends to destroy the insulation which is required beneath the rails toinsulate them from'the roadbed.

A further object of my invention is to provide an improved constructionans. arrangement whereby the rails may be attached readily to theroadbed and especially a construction and arrangement whereby they maybe attached to the roadbed after the manner disclosed in my Patent No.1,657,242, patented January 24:, 1928.

Other objects of my invention and the advantages thereof will be pointedout hereinafter, and for a consideration of what I be lieve to be noveland my invention, attention is directed to the following description andthe claims appended thereto.

In the drawing, Fig. 1 is a perspective view, partly in section, of arailway roadbed embodying my invention, track rails being shown mountedthereon; Fig. 2 is a transverse sectional view, and Fig. 3 is a detailsectional view of a modification.

Referring to the drawing, 1 indicates generally a concrete roadbed for arailway track and 2 and 8 indicate the track rails.

According to the embodiment of my invention illustrated, l construct theconcrete roadbed so that its top surface 4 slopes downwardly awayfrom'each side of each rail. This forms in substance ridges 5 at the twosides of the roadbed upon which the rails rest. I then provide in theroadbed at suitably spaced intervals transversely-extending drainagegrooves 6 which extend throughout the width of the roadbed and intowhich water falling on the roadbed runs and from which the water isdischarged at the two ends of the groove, and I render the ridges 5 forthe track rails continuous by means of metal plates 7 which are suitablyfastened in the concrete and are utilized as parts to which the trackrails are fastened. Metal plates 7 are set into the concrete flush withthe top surface of the roadbed and for anchoring them in position Iutilize preferably U-shaped anchor rods 8 which are embedded in theconcrete with their ends projecting through openings in plates 7, theends being welded to the plates'as is indicated at 9. lVelding of theanchor rods to the plates has the advantage that an integral connectionis formed which is not likely to work loose as is the case with threadedconnections.

The depressions 10 in which metal plates 7 i are set may be formed inthe concrete at the time the concrete is poured by means of woodenpatterns, the patterns having holes clamping members 12 and the springkey fasteners 13. As more fully explained in my above-referred topatent, the spring key fasteners serve to hold the clamping members inposition. As will be seen from Fig. 2, the drainage grooves 6 serve toreceive the lower ends of the rail-fastening means. Preferably thefasteners at the outside of the rails are made wider than are those atthe insides of the rails and grooves 6 may be made wider at these pointsas is indicated at 14 to accommodate the wider fasteners. Beneath therails are insulating members 15 which may be in the form of continuousstrips of rubber or other suitable insulating compound or material. Bymaking the strips 15 continuous they provide a continuous support forthe rails so that the rails do not at any place rest directly on theconcrete. This arrangement is desirable because the surface of concreteis more or less irregular and does not form a good surface for direct.engagement with a rail. On the other hand, a continuousstrip, especiallywhen formed from rubber, provides a good support for the rail and servesto take care of irregularities in the concrete surface. Also, beneaththe upper inturned ends of fasteners 12 are insulating members 16 whichmay be moulded from suitable material and which are provided with sideflanges .17 for retaining the members 1.6 in

place.

Instead of this arrangement, I may form the fastening members 12themselves of insulating material. This is] illustrated in 1 ig. 3 where18 indicates a fastening member so formed. rail and as will be noted thefastening means is spaced. from them and does not in any way interferewith this standard track construction.

By my invention I provide an arrangement ofconcrete-roadbed which can bereadily constructed and which when in use will- -plates to the concretero-adbed, the top surfunction to prevent moisture from accumulatingundertherails, a thing which may result in the insulation beingdestroyed. The transverse grooves 6 perform two functions,-they serve tocarry away water falling in the roadway and they serve asrecesses toreceive thelower ends of the rail-fasten ing means; Likewise, the plates7 perform two functions in that they serve :to render the-ridges 5 forthe track rails continuous and. to provide members to which the-railsmay be anchoredreadily by an approved form ofrail-fastening means. Thearrangement of the transverse grooves 6 brid 'ed by the tie plates-".which receive the rail-fastening means, I feature of my invention as itenables me to use with a concrete roadbed a type of railfastening meansadapted also for use in fastening railsto metal ties such-:as thoseillustrated-in my patent referred-to herein. In accordance with theprovisions of the patent statutes,'I have described theprincipleofoperation of my invention, together with the apparatus which I nowconsider to represent the 1 best embodiment thereof, but

19 indicates the splice bars for a regard as being an important I desireto have it understood that the apparatus shown is only iiiustrative andthat the invention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is

1. A; railway roadbed formed from concrete, said roadbed having ridgesfor supporting track rails and being provided with spaced transversegrooves, tie plates which span said grooves to render the ridges continuous, and means for anchoring the-tie face of the roadbedbeingsloping to drain water away from theridges,

2. In a railway track structure, the cont bmation of acontmuous concreteroadbed having rail supporting ridges and transverse ly-extendinggrooves, the top surface of the roadbed sloping downwardly from saidridges, tie plates anchored to the roadbed-and serving to render saidridges continuous, track rails supported on saidridges, means fasteningthe track rails to said tie plates, and means for insuiating the railsfrom the roadbed and from-the fastening means.

3. In a railway track structure, the com bination of a concrete roadbedhaving spaced, transverselyextending drainage grooves, tie plates whichspan said grooves, rods anchored in the concreteandwelded'to said tieplates for holding the tie plates in position, track-rails supported onsaid tie plates, and means which project into said grooves for fasteningthe rails to the tie plates;

In witness whereof, I have hereunto my hand this19 day of March, 1928.

WILLIAM DALTON.

